Synthesis and Structure of the Hypermodified Nucleoside of Rat Liver Phenylalanine Transfer Ribonucleic Acid.
作者:Taisuke Itaya、Tae Kanai
DOI:10.1248/cpb.50.1318
日期:——
)amino]-3-butenoic acid methyl ester (13) followed by successive gamma-deoxygenation through the cyclocarbonates, separation from the (alphaS,betaR)-isomer by means of flash chromatography, and deprotection. On the other hand, the minor nucleoside of rat liver tRNA(Phe) was isolated on a scale of 100 microg by partial digestion of unfractionated tRNA (1 g) with nuclease P(1), followed by reverse-phase
(αS,βS)-β-羟基-α-[(甲氧羰基)氨基] -4,6-二甲基-9-氧代-3-β-D-呋喃呋喃糖基-4,9-二氢-3H-咪唑的首次合成通过[S-(E)]-4- [4,6-二甲基]的OsO(4)氧化获得[1,2-a]嘌呤-7-丁酸甲酯[(alphaS,betaS)-11] -9-氧代-3- [2,3,5-三-O-(叔丁基二甲基甲硅烷基)-β-D-呋喃呋喃糖基] -4,9-二氢-3H-咪唑并[1,2-a]嘌呤-7 -基] -2-[((甲氧羰基羰基)氨基] -3-丁烯酸甲酯(13),然后通过环碳酸酯依次进行γ-脱氧,通过快速色谱从(αS,betaR)异构体中分离出来,并脱保护。另一方面,通过用核酸酶P(1)部分消化未分级的tRNA(1 g),然后以反相柱色谱法分离大鼠肝tRNA(Phe)的小核苷,其规模为100微克。用核酸酶P(1)/碱性磷酸酶完全消化,并进行反相HPLC。该核苷与合成核苷